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Finding the Fourth Proportional to 57,990.21, 80,065.47 and 36,219.66

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Solution

The fourth proportional to 57,990.21, 80,065.47 and 36,219.66 is: 50,007.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,990.21 : 80,065.47 = 36,219.66 : x
  2. Step 2: Convert to fraction form
    57,990.21/80,065.47 = 36,219.66/x
  3. Step 3: Cross multiply
    57,990.21x = 80,065.47 × 36,219.66
  4. Step 4: Simplify right side
    57,990.21x = 2,899,944,101.14
  5. Step 5: Solve for x
    x = 2,899,944,101.14/57,990.21
  6. Step 6: Final answer
    x = 50,007.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.